Theoretical Analysis of Waste Heat Recovery from an Internal Combustion Engine in a Hybrid Vehicle

Arias, Diego A.; Shedd, Timothy A.; Jester, Ryan K.

doi:10.4271/2006-01-1605

Cited by 78 publications

(21 citation statements)

References 10 publications

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“…Because of this, it is very difficult to design a system that can comprehensively recover waste heat from both the exhaust and the coolant of that system. Some previous designs have used the coolant heat to preheat the working fluid and the exhaust heat to evaporate and superheat the working fluid [15,17,20]. However, the heat addition quantity during the evaporating process is greater than that of the preheating process, whereas, the waste heat quantity of the coolant almost equals that of the exhaust.…”

Section: System Descriptionmentioning

confidence: 89%

“…Results showed that fuel conversion efficiency improved by an average of 7 percent for all injection timings and loads with hot exhaust gas recirculation (EGR) and ORC turbocompounding [16]. Arias et al presented a theoretical study of different waste-heat recovery strategies for an internal combustion engine operating in a hybrid vehicle [17]. While few of these investigations have concentrated on spark ignition engine applications, the auto company BMW has accomplished some pioneering research in this area, performing an analysis of the Rankine cycle as an additional power generation process using the waste heat of a car engine [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of a novel system combining a dual loop organic Rankine cycle (ORC) with a gasoline engine

Wang

Zhang

Zhao

et al. 2012

Energy

135

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a b s t r a c tAn organic Rankine cycle (ORC) can be used to harness the wasted heat from an internal combustion engine. In this paper, the characteristics of a novel system combining a gasoline engine with a dual loop ORC which recovers the waste heat from both the exhaust and coolant systems is analyzed. A high temperature loop recovers the exhaust heat while a low temperature loop recovers both the residual high temperature loop heat and the coolant heat. The performance map of a gasoline engine is measured on an engine test bench and the heat quantities wasted by the exhaust and coolant systems are calculated and compared within the engine's entire operating region. Based on this data, the working parameters of a dual loop ORC are defined, and the performance of a combined engine-ORC system is evaluated across this entire region. The results show that the net power of the low temperature loop is higher than that of the high temperature loop, and the relative output power improves by from 14 to 16% in the peak effective thermal efficiency region to 50% in the small load region, and the absolute effective thermal efficiency increases by 3e6% throughout the engine's operating region.

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Section: System Descriptionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Performance analysis of a novel system combining a dual loop organic Rankine cycle (ORC) with a gasoline engine

Wang

Zhang

Zhao

et al. 2012

Energy

135

View full text Add to dashboard Cite

show abstract

“…10.26). This technology has been extensively investigated since the early 1970s and covered in literature (DiBella et al, 1983;Diehl et al, 2001;Crane et al, 2001;Chammas and Clodic, 2005;Stobart and Weerasinghe, 2006;Arias et al, 2006;Teng et al, 2006Teng et al, , 2007aTeng et al, , 2007bKruiswyk, 2008;Nelson, 2009;Ringler et al, 2009;Teng, 2010;Edwards et al, 2010Edwards et al, , 2012Hirschbichler, 2010;Briggs et al, 2010Briggs et al, , 2012Chiew et al, 2011;Arunachalam et al, 2012;Latz et al, 2012;Lopes et al, 2012). It can be applied to EGR heat rejection, charge air heat rejection, turbine outlet exhaust heat, and even engine coolant heat rejection.…”

Section: Waste Heat Recovery (Whr) Systemsmentioning

confidence: 98%

Improving the environmental performance of heavy-duty vehicles and engines: particular technologies

Xin

Pinzon

2014

Alternative Fuels and Advanced Vehicle Technologies for Improved Environmental Performance

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“…Alternatively, if heat is recovered to another working fluid for example, into water or into an organic fluid, the resulting vapour can then be expanded through a fluid expander. The efficiency of the exhaust heat secondary fluid power cycle depends on the combined effectiveness of heat recovery (utilisation) method and the expansion cycle [6]. Our approach adopts an exergy based analysis of the two energy recovery methods.…”

Section: Theoretical Analysis Heat Recovery and Expansion Vs Turbo-comentioning

confidence: 99%

Thermal efficiency improvement in high output diesel engines a comparison of a Rankine cycle with turbo-compounding

Weerasinghe

Stobart

Hounsham

2010

Applied Thermal Engineering

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Thermal management, in particular, heat recovery and utilisation in internal combustion engines result in improved fuel economy, reduced emissions, fast warm up and optimized cylinder head temperatures. Turbocompounding is a heat recovery technique that has been successfully used in medium and large scale engines. Heat recovery to a secondary fluid and expansion is used in large scale engines, such as in power plants in the form of heat recovery steam generators(HRSG) [1]. The present paper presents a thermodynamic analysis of turbocompounding and heat recovery and utilisation through a fluid power cycle, a technique that is also applicable to medium and small scale engines. In a fluid power cycle, the working fluid is stored in a reservoir and expanded subsequently. The reservoir acts as an energy buffer that improves the overall efficiency, significantly. This paper highlights the relative advantage of exhaust heat secondary power cycles over turbocompounding with the aid of MATLAB based QSS Toolbox [2] simulation results. Steam has been selected as the working fluid in this work for its superior heat capacity over organic fluids and gases.

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Theoretical Analysis of Waste Heat Recovery from an Internal Combustion Engine in a Hybrid Vehicle

Cited by 78 publications

References 10 publications

Performance analysis of a novel system combining a dual loop organic Rankine cycle (ORC) with a gasoline engine

Performance analysis of a novel system combining a dual loop organic Rankine cycle (ORC) with a gasoline engine

Improving the environmental performance of heavy-duty vehicles and engines: particular technologies

Thermal efficiency improvement in high output diesel engines a comparison of a Rankine cycle with turbo-compounding

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